Handle for screw drivers or the like



16, 1949- Y J. R. FERKINS 4 2,479,508

HANDLE FOR SCREW DRIVERS OR THE LIKE Filed July 11, 1945 Mai M1 0 Patented Aug. 16, 1949 "UNlT'Eo sTATEs PATENT OFFICE HANDLE FOR SCREW DRIVERS OR THE LIKE John R. Perkins, Wayne, Maine Application July 11, 1945, Serial No. 604,367 2 Claims. (01. 145-61) The invention relates to a device for turning screws, nuts and similar objects.

An object of the invention is to provide a turning tool which is simple, practical and eflicient.

Another object of the invention is to provide a turning tool adapted to transmit a maximum of applied pressure along the axis of the tool,

Another object of the invention is to provide a device with handle means adapted to facilitate turning the tool at different speeds.

Another object of the invention is to provide a turning tool having handle means which is' comfortable and adapted to give the user a secure and effective grip.

Other objects of the invention will be in part obvious or in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, arrangements of parts, and in the several steps and relation and order of each of said steps to one or more of the others thereof, all as will be pointed out in the following description, and the scope of the application of which will be indicated in the following claims.

The invention will best be understood if the following description is read in connection with the drawings, in which,

Figure 1 is an illustration of the side view of this device for use as a screwdriver. Figure 2 is an end view of this device for use as a screwdriver.

The embodiment of this device as shown in Figure 1 consists of a metal rod I which is crossshaped at 2 for insertion in the cross-shaped slot of the screw. The upper end of rod l is set in handle 3 which is approximately cylindrical in shape. Near the end of handle 3 there is a reduction in diameter to form shoulder 4. That portion of the handle of reduced diameter 5 is flared at the extreme end 6. Near the opposite end of handle 3 is a groove 1 forming shoulder 8. Portions 4, 5 and 6 of handle 3 are shown in Figure 1 as roughened by longitudinal lines to provide a better grip, but they may be left smooth or any other manner of roughening may be used.

ikewise, a portion of handle 3 is shown fluted to provide a better grip, but I do not restrict my invention to that cross-section of handle.

The use of the apparatus is as follows:

When the resistance to the turning of the screw is great, and great leverage is desired, the large diameter of the screwdriver between 4 and 1 is seized with the hand. The large diameter gives great leverage and the size, shape and lo- 2 cation of the shoulders 4 and 8 permit pressure to be easily applied along the axis of the screwdriver against the screw.

When the resistance to turning is small, the handle may be held at the small diameter 5 and turned rapidly to cause rapid turning of the screw. The shoulder 4 permits pressure to be applied along the axis of the screwdriver to hold the screwdriver against the screw. The flare 6 at the end of the handle is to prevent the fingers from slipping off of the end of the screwdriver.

The cross-shaped point of contact 2 with the object to be turned provides surfaces at angles to one another which prevent the end of the screwdriver slipping off of the object to be turned.

Although screwdrivers, have long been made with a variation in the diameter of the handle,

portions being concentrically disposed along the alignment with the longitudinal axi of the handle.

2. A handle for screw drivers and the like comprising first and second portions arranged conand separated with a cross-shaped surface of Number JOHN R. PERKINS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Starrett July 29, 1890 Sylvia Dec. 6, 1892 Wade Apr. 8, 1902 Ohlson May 31, 1904 Albrecht Jan. 14, 1908 Duffy Sept. 14, 1943 

